Table 1.

Statistics of superstall backward stepping

Force, pN	Steps within a backward run*				First backward step after a forward step†
	Rate constant λ1, s−1	Rate constant λ2, s−1	Amplitude ratio Z2/Z1	n	Rate constant, s−1	n
3	11.9 ± 2.6	1.7 ± 0.7	1.04	395	1.6 ± 0.2	78
5	17.4 ± 3.3	2.6 ± 1.4	0.64	675	2.6 ± 0.3	82
10	35.5 ± 5.6	3.8 + 5/−3.7	0.03	198	6.3 ± 2.4	20

*Data include experiments with 0, 0.25, and 1 μM ATP (displayed in Fig. 3D).

^†Data include experiments with 0.25 and 1 μM ATP. The rate constant is calculated as the inverse of the average dwell time.